STRIP CORE, METHOD FOR MANUFACTURING STRIP CORE, AND DEVICE FOR MANUFACTURING STRIP CORE Russian patent published in 2024 - IPC H01F41/02 H01F27/245 H01F3/04 

FIELD: electrical engineering.

SUBSTANCE: strip core (10) includes a portion in which grain-oriented electrical steel sheets (1), where flat portions (4) and curved portions (5) are alternately continuous in the longitudinal direction, are stacked on top of each other in the sheet thickness direction, and formed by laying sheets (1) of grain-oriented electrical steel that are separately bent, layered, and assembled into a strip form. When the average height of the curved roughening member in the width direction intersecting the longitudinal direction forming the surface of curved portion (5) of regular grain oriented steel sheet (1) is Ra(b), and the average height of the curved roughening member in the width direction forming the surface of flat section (4) of grain oriented steel sheet (1), is Ra(s), are in the ratio of 1.0<Ra(b)/Ra(s)≤5.00.

EFFECT: reduced noise in the core when bending a steel sheet.

6 cl, 10 dwg, 5 tbl